The Structure Of The Earth

How many layers is earth made of ?

• 3

• 7

• 6

Which is the thinnest layer of the earth ?

• Mantle

• Crust

• Core

How much thick is the Mantle ?

• 5 km

• 3,500 km

• 2, 900 km

How much thick is the core ?

• 3,500 km

• 5 Km

• 2,900 Km

How many times of rocks are there ?

• 1

• 2

• 3

• 4

Igneous rocks are also called Primary rocks.

• True

• False

Sedimentary rocks are harder than Igneous Rocks.

• True

• False

Some common examples of metamorphic rocks are :-

• Limestone, Sandstone, Shale and Chalk

• Marble, Slate, Quartzite and Gneiss

• Dolerite, Granite, Basalt and Obsidian

Fossil fuels like Petroleum are obtained from

• Igneous Rocks

• Sedimentary Rocks

• Metamorphic Rocks

The scientific study of rocks is called Petrology.

• True

• False